Feature/lxl 4504 cataloguing items

[lrosenstrom]

Tickets involved

LXL-4504

Solves

Support for creating and displaying of IDs when cataloguing items*.

Summary of changes

• Make it possible to add an ID to a copy by clicking the "vertical ellipsis" icon next to the add button. The client creates a temporary ID that is replaced by a backend-generated ID on save
• Display IDs in the upper right corner of local items as long as some conditions are fulfilled (is a hasComponent entry and has an @id)
• Support for showing "ID-labels" as added or removed in the history view

TODO:

• When trying to link to a copy by adding e.g. a relatedTo field and searching for the copy's ID in the right search panel, the only hits are the instance and item containing the copy. How should this work? Are backend changes needed?
• Show reverse relations for copies, i.e. a (smaller than the current standard?) button, displaying the number of links to the copy, and the entities containing the links when clicking the button.

* "Exemplar" in Swedish.